Investment in Global - Unrealized Loss Position (Details) (Investment in Global, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Investment in Global
Unrealized Loss Position Less Than 12 Months - Fair Value	$ 7,509
Unrealized Loss Position Less Than 12 Months - Unrealized Loss	(2,470)
Total Unrealized Loss Position - Fair Value	7,509
Total Unrealized Loss Position - Unrealized Loss	$ (2,470)